Primary Purpose
| primary_purpose | Study_Count |
|---|---|
| Treatment | 601 |
| Prevention | 196 |
| Health Services Research | 54 |
| Supportive Care | 50 |
| Other | 42 |
| NA | 37 |
| Basic Science | 35 |
| Diagnostic | 14 |
| Screening | 11 |
| Device Feasibility | 2 |
| Educational/Counseling/Training | 1 |
Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD
See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG
To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html
| Type | Study_count |
|---|---|
| Total_Studies | 1291 |
| interventional | 1043 |
| Observational | 238 |
| Registry | 10 |
```
| intervention_type | Study_Count |
|---|---|
| Drug | 521 |
| Behavioral | 202 |
| Drug|placebo | 78 |
| Other | 51 |
| Biological | 47 |
| Device | 23 |
| Behavioral|Other | 18 |
| Procedure | 13 |
| Biological|placebo | 10 |
| Dietary Supplement|placebo | 10 |
| Dietary Supplement | 8 |
| Combination Product | 7 |
| Diagnostic Test | 7 |
| Drug|Other | 7 |
| Behavioral|Drug | 6 |
| Device|Other | 4 |
| Drug|Other|placebo | 3 |
| Biological|Drug|placebo | 2 |
| Biological|Other | 2 |
| Dietary Supplement|Drug | 2 |
| Drug|Procedure | 2 |
| Behavioral|Biological | 1 |
| Behavioral|Device|Procedure | 1 |
| Behavioral|Diagnostic Test|Drug | 1 |
| Behavioral|Diagnostic Test|Procedure | 1 |
| Behavioral|Dietary Supplement | 1 |
| Behavioral|Other|Procedure | 1 |
| Behavioral|Procedure | 1 |
| Biological|Device | 1 |
| Biological|Drug | 1 |
| Biological|Drug|Other | 1 |
| Combination Product|Device | 1 |
| Combination Product|Drug | 1 |
| Combination Product|placebo | 1 |
| Device|Drug | 1 |
| Device|placebo | 1 |
| Dietary Supplement|Drug|placebo | 1 |
| Drug|Genetic | 1 |
| Drug|Radiation | 1 |
| Genetic | 1 |
| Other|placebo | 1 |
| Country | Study_Count |
|---|---|
| United States | 509 |
| NA | 71 |
| United States|Puerto Rico | 37 |
| South Africa | 31 |
| Canada | 20 |
| Kenya | 20 |
| Uganda | 20 |
| United Kingdom | 17 |
| Thailand | 15 |
| Brazil | 12 |
| China | 11 |
| Spain | 11 |
| United States|Canada | 10 |
| France | 9 |
| Germany | 8 |
| Tanzania | 8 |
| Australia | 7 |
| Malawi | 7 |
| Switzerland | 7 |
| Lesotho | 6 |
| Mexico | 6 |
| Belgium | 5 |
| Mozambique | 5 |
| India | 4 |
| United States|Canada|Puerto Rico | 4 |
| Argentina | 3 |
| Botswana | 3 |
| Denmark | 3 |
| Ireland | 3 |
| Italy | 3 |
| Nigeria | 3 |
| Russian Federation | 3 |
| Senegal | 3 |
| Singapore | 3 |
| Taiwan | 3 |
| Vietnam | 3 |
| Zambia | 3 |
| Zimbabwe | 3 |
| Burkina Faso|Côte D’Ivoire|Mali|Togo | 2 |
| Cameroon | 2 |
| Estonia | 2 |
| Ethiopia | 2 |
| Ghana | 2 |
| Indonesia | 2 |
| Netherlands | 2 |
| Romania | 2 |
| Rwanda | 2 |
| Swaziland | 2 |
| United States|South Africa | 2 |
| United States|Tanzania | 2 |
| |United States|Italy|Puerto Rico | 1 |
| Argentina|Brazil|Canada|United Kingdom | 1 |
| Argentina|Brazil|India|Kenya|South Africa | 1 |
| Argentina|France|South Africa|United States|Thailand | 1 |
| Australia|Brazil|France|Poland|Russian Federation|Spain|Sweden|United Kingdom | 1 |
| Australia|France|Germany|Italy|Spain|United Kingdom | 1 |
| Australia|United States|American Samoa | 1 |
| Austria | 1 |
| Austria|Belgium|Denmark|France|Germany|Hungary|Ireland|Israel|Poland|Spain|Sweden|Switzerland|United Kingdom | 1 |
| Austria|Belgium|Denmark|France|Germany|Ireland|Italy|Latvia|Netherlands|Portugal|Spain|Switzerland|United Kingdom | 1 |
| Austria|Belgium|Denmark|Germany|Hungary|Israel|Portugal|Russian Federation|Spain|Switzerland|United Kingdom | 1 |
| Austria|Denmark|France|Germany|Hungary|Israel|Romania|Russian Federation|Spain|Switzerland|United Kingdom | 1 |
| Belgium|France|Germany|Ireland|Italy|Spain|United Kingdom | 1 |
| Belgium|France|Germany|Italy|Romania|Russian Federation|Spain|Switzerland|United Kingdom | 1 |
| Belgium|Netherlands | 1 |
| Brazil|Estonia|India|Thailand | 1 |
| Bulgaria | 1 |
| Cambodia | 1 |
| Cambodia|Thailand | 1 |
| Cameroon|Kenya|Senegal|South Africa|Thailand|Uganda | 1 |
| Chile|France|United States|Argentina|Australia|Austria|Brazil|Germany|Guatemala|Hungary|Malaysia|Panama|Puerto Rico|Romania|South Africa|Spain|Taiwan|Thailand|United Kingdom | 1 |
| China|Korea, Republic of | 1 |
| China|Korea, Republic of|Singapore | 1 |
| Congo, The Democratic Republic of the | 1 |
| Ecuador | 1 |
| France|Canada | 1 |
| Georgia | 1 |
| Germany|Ireland|Netherlands|Thailand|United Kingdom | 1 |
| Germany|Netherlands | 1 |
| Germany|United Kingdom | 1 |
| Haiti | 1 |
| India|Malawi|South Africa|Tanzania|Uganda|Zambia|Zimbabwe | 1 |
| India|South Africa|Uganda | 1 |
| Iran, Islamic Republic of | 1 |
| Israel | 1 |
| Italy|United States|France|Germany|South Africa|Spain | 1 |
| Jamaica | 1 |
| Japan | 1 |
| Kazakhstan | 1 |
| Kenya|Malawi|Rwanda|South Africa|Tanzania | 1 |
| Kenya|Malawi|Uganda|Zambia|Zimbabwe | 1 |
| Kenya|Malawi|Uganda|Zimbabwe | 1 |
| Kenya|Tanzania|Thailand|Uganda | 1 |
| Kenya|Zimbabwe | 1 |
| Korea, Republic of | 1 |
| Mauritius|Thailand | 1 |
| Nepal | 1 |
| Norway | 1 |
| Peru | 1 |
| Puerto Rico|United States | 1 |
| South Africa|Tanzania | 1 |
| South Africa|Tanzania|Uganda|Zambia | 1 |
| South Africa|Thailand | 1 |
| South Africa|Thailand|Ukraine | 1 |
| South Africa|Uganda|Zambia | 1 |
| South Africa|Uganda|Zimbabwe | 1 |
| South Africa|Zimbabwe | 1 |
| Spain|Sweden|Switzerland|Puerto Rico|United States|Belgium|Canada|France|Poland|United Kingdom | 1 |
| Sweden | 1 |
| Thailand|Argentina|Brazil|Mexico|Peru|Russian Federation|South Africa | 1 |
| Uganda|Zimbabwe | 1 |
| United States|Argentina|Australia|Austria|Belgium|Brazil|Chile|Czechia|Denmark|Estonia|Finland|France|Germany|Greece|India|Ireland|Israel|Italy|Luxembourg|Malaysia|Mali|Mexico|Morocco|Nigeria|Norway|Peru|Poland|Portugal|Puerto Rico|South Africa|Spain|Sweden|Switzerland|Thailand|Uganda|United Kingdom | 1 |
| United States|Argentina|Australia|Austria|Brazil|Canada|Denmark|France|Mexico|Netherlands|Portugal|Puerto Rico|Romania|Russian Federation|South Africa|Spain|Sweden|Taiwan|Thailand|United Kingdom | 1 |
| United States|Argentina|Australia|Belgium|Brazil|Canada|Chile|France|Greece|Hungary|Italy|Mexico|Netherlands|Poland|Romania|Russian Federation|South Africa|Spain|Taiwan|United Kingdom | 1 |
| United States|Argentina|Australia|Belgium|Canada|France|Germany|Italy|Korea, Republic of|Mexico|Netherlands|Portugal|Romania|Russian Federation|South Africa|Spain|Taiwan|United Kingdom | 1 |
| United States|Argentina|Australia|Belgium|Canada|France|Germany|Italy|Mexico|Peru|Poland|Portugal|Romania|Russian Federation|Spain|Switzerland|Taiwan|United Kingdom | 1 |
| United States|Argentina|Australia|Canada|France|Germany|Italy|Korea, Republic of|Mexico|Russian Federation|South Africa|Spain|Sweden | 1 |
| United States|Argentina|Austria|Brazil|China|France|Germany|Mexico|Puerto Rico|Russian Federation|South Africa|Thailand|Uganda|United Kingdom | 1 |
| United States|Argentina|Brazil|Puerto Rico|South Africa | 1 |
| United States|Argentina|Canada|France|Italy|Mexico|Portugal|Puerto Rico|Russian Federation|South Africa|Spain|Thailand|United Kingdom | 1 |
| United States|Argentina|Colombia|Germany|Mexico|Peru|Romania|Russian Federation|South Africa|Spain | 1 |
| United States|Argentina|France|Guatemala|Mexico|Peru|Puerto Rico|Romania|Russian Federation|South Africa|Ukraine | 1 |
| United States|Argentina|Mexico|Portugal|Puerto Rico|Russian Federation|South Africa | 1 |
| United States|Argentina|South Africa|Thailand|United Kingdom | 1 |
| United States|Australia | 1 |
| United States|Australia|Austria|Belgium|Canada|France|Germany|Italy|Portugal|Puerto Rico|Spain|United Kingdom | 1 |
| United States|Australia|Austria|Canada|Dominican Republic|Germany|Mexico|Puerto Rico|United Kingdom | 1 |
| United States|Australia|Belgium|Canada|Czech Republic|France|Germany|Greece|Ireland|Italy|Netherlands|Poland|Puerto Rico|Russian Federation|Singapore|Spain|Switzerland|Taiwan|United Kingdom | 1 |
| United States|Australia|Belgium|Canada|Denmark|France|Germany|Italy|Netherlands|Romania|Spain|United Kingdom | 1 |
| United States|Australia|Canada|Denmark|France|Germany|Italy|Sweden|Switzerland|United Kingdom | 1 |
| United States|Australia|Canada|France|Germany|Italy|Russian Federation|Spain|United Kingdom | 1 |
| United States|Australia|Canada|France|Puerto Rico | 1 |
| United States|Australia|Puerto Rico | 1 |
| United States|Austria|Belgium|Canada|France|Germany|Italy|Latvia|Luxembourg|Poland|Portugal|Romania|Spain|Switzerland | 1 |
| United States|Austria|Belgium|Canada|France|Germany|Italy|Portugal|Puerto Rico|Spain|Switzerland|United Kingdom | 1 |
| United States|Bahamas|Brazil|Puerto Rico | 1 |
| United States|Belgium|Canada|France|Germany|Italy|Portugal|Spain|United Kingdom | 1 |
| United States|Belgium|Canada|Romania|Russian Federation|South Africa|Spain | 1 |
| United States|Belgium|Dominican Republic|France|Italy|Mexico|Portugal|Puerto Rico|Russian Federation|Thailand|Uganda|United Kingdom | 1 |
| United States|Botswana | 1 |
| United States|Brazil|Chile|France|Italy|Portugal|Spain|United Kingdom | 1 |
| United States|Brazil|Italy|Mexico|Portugal|Puerto Rico|South Africa|Spain|Thailand | 1 |
| United States|Canada|France|Germany|Portugal|Puerto Rico|Spain|United Kingdom | 1 |
| United States|Canada|France|Germany|Spain | 1 |
| United States|Canada|France|Italy|Poland|Puerto Rico|Spain | 1 |
| United States|Canada|France|Italy|Spain | 1 |
| United States|Canada|Netherlands|Puerto Rico | 1 |
| United States|Costa Rica|Panama|Puerto Rico | 1 |
| United States|Denmark|Germany | 1 |
| United States|Dominican Republic|Russian Federation|Thailand|Uganda | 1 |
| United States|France|Germany|Italy|Puerto Rico|Romania|Russian Federation|Spain|Switzerland | 1 |
| United States|France|Germany|Italy|Russian Federation|Spain | 1 |
| United States|France|United Kingdom | 1 |
| United States|Germany | 1 |
| United States|Germany|Spain | 1 |
| United States|Italy | 1 |
| United States|Kazakhstan | 1 |
| United States|Kenya|Puerto Rico|South Africa | 1 |
| United States|Mexico | 1 |
| United States|Netherlands | 1 |
| United States|Puerto Rico|Tanzania | 1 |
| United States|Russian Federation | 1 |
| United States|Rwanda | 1 |
| United States|South Africa|Thailand | 1 |
| United States|South Africa|Thailand|Uganda|Zimbabwe | 1 |
| United States|South Africa|Zimbabwe | 1 |
| United States|Spain|Belgium|Canada|France|Italy|Portugal | 1 |
| United States|Uganda | 1 |
| United States|Zambia | 1 |
| Zimbabwe|United States|Malawi|South Africa|Zambia | 1 |
| Site_count | Study_Count |
|---|---|
| 1 | 632 |
| 2 | 87 |
| 3 | 37 |
| 4 | 29 |
| 5 | 25 |
| 6 | 14 |
| 7 | 14 |
| 8 | 11 |
| 9 | 11 |
| 10 | 5 |
| 11 | 7 |
| 12 | 10 |
| 13 | 4 |
| 14 | 7 |
| 15 | 8 |
| 16 | 3 |
| 17 | 9 |
| 18 | 8 |
| 19 | 6 |
| 20 | 4 |
| 21 | 3 |
| 22 | 3 |
| 23 | 4 |
| 24 | 3 |
| 25 | 2 |
| 26 | 3 |
| 27 | 1 |
| 28 | 4 |
| 30 | 2 |
| 32 | 3 |
| 34 | 3 |
| 35 | 3 |
| 36 | 3 |
| 37 | 5 |
| 39 | 3 |
| 40 | 2 |
| 41 | 2 |
| 42 | 1 |
| 43 | 1 |
| 44 | 3 |
| 45 | 3 |
| 46 | 2 |
| 47 | 3 |
| 48 | 2 |
| 49 | 2 |
| 50 | 1 |
| 51 | 3 |
| 52 | 3 |
| 54 | 3 |
| 56 | 2 |
| 60 | 1 |
| 62 | 1 |
| 66 | 1 |
| 67 | 1 |
| 68 | 2 |
| 69 | 1 |
| 71 | 2 |
| 72 | 1 |
| 75 | 1 |
| 76 | 2 |
| 80 | 2 |
| 82 | 1 |
| 87 | 2 |
| 89 | 2 |
| 90 | 1 |
| 95 | 1 |
| 96 | 1 |
| 99 | 2 |
| 101 | 1 |
| 103 | 1 |
| 105 | 1 |
| 115 | 1 |
| 120 | 1 |
| 129 | 1 |
| 145 | 1 |
| 180 | 1 |
| 218 | 1 |
| Phase | Study_Count |
|---|---|
| N/A | 378 |
| Phase 1 | 224 |
| Phase 2 | 162 |
| Phase 3 | 148 |
| Phase 4 | 80 |
| Phase 1/Phase 2 | 27 |
| Phase 2/Phase 3 | 18 |
| Early Phase 1 | 6 |
| Number_of_Arms | Count_of_Studies |
|---|---|
| 1 | 179 |
| 2 | 420 |
| 3 | 85 |
| 4 | 46 |
| 5 | 17 |
| 6 | 9 |
| 7 | 2 |
| 8 | 4 |
| 9 | 4 |
| 10 | 1 |
| 11 | 2 |
| 12 | 1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 1 |
| 18 | 1 |
| 21 | 1 |
| NA | 268 |
| Count of Versions | Count of Studies |
|---|---|
| 1 | 146 |
| 2 | 119 |
| 3 | 123 |
| 4 | 139 |
| 5 | 99 |
| 6 | 80 |
| 7 | 63 |
| 8 | 43 |
| 9 | 22 |
| 10 | 28 |
| 11 | 19 |
| 12 | 11 |
| 13 | 15 |
| 14 | 10 |
| 15 | 12 |
| 16 | 6 |
| 17 | 8 |
| 18 | 3 |
| 19 | 4 |
| 20 | 5 |
| 21 | 6 |
| 22 | 6 |
| 23 | 3 |
| 24 | 5 |
| 25 | 2 |
| 26 | 2 |
| 27 | 4 |
| 28 | 2 |
| 29 | 1 |
| 30 | 3 |
| 31 | 4 |
| 32 | 3 |
| 35 | 3 |
| 36 | 1 |
| 37 | 3 |
| 38 | 3 |
| 39 | 1 |
| 40 | 2 |
| 41 | 2 |
| 42 | 2 |
| 43 | 1 |
| 44 | 2 |
| 45 | 1 |
| 46 | 1 |
| 47 | 1 |
| 48 | 2 |
| 52 | 1 |
| 53 | 2 |
| 54 | 1 |
| 55 | 2 |
| 59 | 1 |
| 60 | 1 |
| 65 | 1 |
| 66 | 2 |
| 67 | 1 |
| 68 | 1 |
| 72 | 2 |
| 82 | 1 |
| 96 | 1 |
| 99 | 1 |
| 111 | 1 |
| 114 | 1 |
| 182 | 1 |
| 189 | 1 |
| Change Type | Count_of_Changes | Count_of_Studies | ratio |
|---|---|---|---|
| Study Status | 7615 | 897 | 8.489409 |
| Contacts/Locations | 2848 | 721 | 3.950069 |
| Recruitment Status | 1364 | 699 | 1.951359 |
| None (earliest Version on record) | 1043 | 1043 | 1.000000 |
| Study Design | 1028 | 622 | 1.652733 |
| Outcome Measures | 878 | 421 | 2.085511 |
| Sponsor/Collaborators | 753 | 444 | 1.695946 |
| Study Identification | 733 | 437 | 1.677345 |
| Study Description | 610 | 337 | 1.810089 |
| Arms | 609 | 340 | 1.791176 |
| Interventions | 609 | 340 | 1.791176 |
| Eligibility | 601 | 325 | 1.849231 |
| Oversight | 465 | 365 | 1.273973 |
| Conditions | 458 | 270 | 1.696296 |
| More Information | 354 | 109 | 3.247706 |
| References | 347 | 245 | 1.416327 |
| Results | 162 | 162 | 1.000000 |
| IPDSharing | 105 | 88 | 1.193182 |
| Baseline Characteristics | 90 | 65 | 1.384615 |
| Participant Flow | 82 | 62 | 1.322581 |
| Reported Adverse Events | 70 | 55 | 1.272727 |
| Results Submission Events | 65 | 65 | 1.000000 |
| Documents | 63 | 57 | 1.105263 |
| Measure | Early.Phase.1 | N.A | Phase.1 | Phase.1.Phase.2 | Phase.2 | Phase.2.Phase.3 | Phase.3 | Phase.4 |
|---|---|---|---|---|---|---|---|---|
| Min. | 6.00000 | 4.0000 | 5.00000 | 10.00000 | 5.0000 | 30.000 | 1.0000 | 10.0000 |
| 1st Qu. | 11.25000 | 70.0000 | 18.00000 | 20.00000 | 44.5000 | 63.500 | 146.7500 | 33.0000 |
| Median | 26.50000 | 229.0000 | 30.00000 | 30.00000 | 90.0000 | 157.500 | 313.0000 | 88.0000 |
| Mean | 60.83333 | 870.1261 | 43.02358 | 71.74074 | 225.2312 | 1385.833 | 716.7153 | 526.1266 |
| 3rd Qu. | 66.50000 | 531.0000 | 48.00000 | 96.00000 | 179.0000 | 1786.000 | 645.5000 | 225.0000 |
| Max. | 220.00000 | 25000.0000 | 500.00000 | 333.00000 | 5029.0000 | 12000.000 | 10000.0000 | 18696.0000 |
| group_type | Group_Count |
|---|---|
| Experimental | 1152 |
| Active Comparator | 312 |
| NA | 268 |
| No Intervention | 143 |
| Placebo Comparator | 114 |
| Other | 79 |
| Sham Comparator | 4 |
| intervention_model | Study_Count |
|---|---|
| Parallel Assignment | 505 |
| Single Group Assignment | 231 |
| NA | 189 |
| Crossover Assignment | 79 |
| Factorial Assignment | 25 |
| Sequential Assignment | 14 |
| primary_purpose | Study_Count |
|---|---|
| Treatment | 601 |
| Prevention | 196 |
| Health Services Research | 54 |
| Supportive Care | 50 |
| Other | 42 |
| NA | 37 |
| Basic Science | 35 |
| Diagnostic | 14 |
| Screening | 11 |
| Device Feasibility | 2 |
| Educational/Counseling/Training | 1 |
| Country | Study_Count |
|---|---|
| United States | 87 |
| NA | 38 |
| Thailand | 8 |
| Canada | 6 |
| France | 6 |
| Germany | 6 |
| Spain | 6 |
| Uganda | 6 |
| China | 5 |
| Brazil | 4 |
| Swaziland | 4 |
| Taiwan | 4 |
| United Kingdom | 4 |
| Ghana | 3 |
| Italy | 3 |
| Japan | 3 |
| Kenya | 3 |
| Korea, Republic of | 3 |
| Lesotho | 3 |
| South Africa | 3 |
| United States|Puerto Rico | 3 |
| United States|Canada | 2 |
| Argentina | 1 |
| Argentina|Brazil|Mexico | 1 |
| Australia | 1 |
| Cameroon|Kenya|Lesotho|Swaziland|Uganda | 1 |
| Ecuador|Peru | 1 |
| Ethiopia | 1 |
| Finland|Ireland|Netherlands|Portugal|Switzerland | 1 |
| Hong Kong | 1 |
| India | 1 |
| Indonesia | 1 |
| Israel | 1 |
| Kenya|South Africa | 1 |
| Netherlands | 1 |
| Nigeria | 1 |
| Poland | 1 |
| Russian Federation | 1 |
| Rwanda|South Africa | 1 |
| Switzerland | 1 |
| Tanzania | 1 |
| Uganda|Zimbabwe | 1 |
| United States|Australia|Brazil|Canada|Zimbabwe | 1 |
| United States|Belgium|Brazil|Canada|France|Germany|Greece|Italy|Puerto Rico|Spain|United Kingdom | 1 |
| United States|Brazil|Peru|South Africa | 1 |
| United States|India|Kenya|Thailand | 1 |
| United States|Malawi|South Africa|Tanzania|Uganda | 1 |
| Vietnam | 1 |
| Zambia | 1 |
| Zimbabwe | 1 |
| Site_count | Study_Count |
|---|---|
| 1 | 172 |
| 2 | 8 |
| 3 | 8 |
| 4 | 5 |
| 5 | 6 |
| 6 | 3 |
| 7 | 1 |
| 8 | 6 |
| 9 | 4 |
| 10 | 2 |
| 11 | 1 |
| 12 | 3 |
| 13 | 1 |
| 14 | 1 |
| 15 | 2 |
| 17 | 1 |
| 18 | 2 |
| 19 | 1 |
| 20 | 2 |
| 21 | 1 |
| 23 | 2 |
| 29 | 1 |
| 30 | 1 |
| 34 | 1 |
| 38 | 1 |
| 90 | 1 |
| 267 | 1 |
| Count of Versions | Count of Studies |
|---|---|
| 1 | 28 |
| 2 | 32 |
| 3 | 58 |
| 4 | 19 |
| 5 | 15 |
| 6 | 14 |
| 7 | 10 |
| 8 | 6 |
| 9 | 7 |
| 10 | 10 |
| 11 | 2 |
| 12 | 7 |
| 13 | 2 |
| 14 | 3 |
| 15 | 1 |
| 16 | 2 |
| 17 | 4 |
| 20 | 2 |
| 23 | 1 |
| 24 | 1 |
| 25 | 1 |
| 27 | 3 |
| 30 | 1 |
| 33 | 2 |
| 46 | 1 |
| 56 | 1 |
| 67 | 1 |
| 71 | 1 |
| 106 | 1 |
| 125 | 1 |
| 152 | 1 |
| Change Type | Count_of_Changes | Count_of_Studies | ratio |
|---|---|---|---|
| Study Status | 1741 | 210 | 8.290476 |
| Contacts/Locations | 508 | 150 | 3.386667 |
| Study Design | 281 | 154 | 1.824675 |
| Recruitment Status | 259 | 160 | 1.618750 |
| None (earliest Version on record) | 238 | 238 | 1.000000 |
| Study Description | 223 | 83 | 2.686747 |
| Eligibility | 161 | 103 | 1.563107 |
| Sponsor/Collaborators | 160 | 89 | 1.797753 |
| Study Identification | 131 | 89 | 1.471910 |
| Conditions | 90 | 53 | 1.698113 |
| Outcome Measures | 90 | 66 | 1.363636 |
| Groups | 87 | 62 | 1.403226 |
| Interventions | 87 | 62 | 1.403226 |
| References | 85 | 50 | 1.700000 |
| Oversight | 77 | 66 | 1.166667 |
| Results | 19 | 19 | 1.000000 |
| IPDSharing | 12 | 12 | 1.000000 |
| More Information | 7 | 5 | 1.400000 |
| Results Submission Events | 4 | 4 | 1.000000 |
| Documents | 3 | 3 | 1.000000 |
| Baseline Characteristics | 1 | 1 | 1.000000 |
| Measure | Observational |
|---|---|
| Min | 0.0000 |
| 1st Qu | 56.2500 |
| Median | 200.0000 |
| Mean | 987.0676 |
| 3rd Qu | 531.0000 |
| Max | 40000.0000 |
| observational_model | Study_Count |
|---|---|
| Cohort | 124 |
| NA | 51 |
| Case-Only | 20 |
| Other | 14 |
| Case-Control | 13 |
| Case Control | 12 |
| Defined Population, Natural History | 2 |
| Natural History | 2 |
| time_perspective | Study_Count |
|---|---|
| Prospective | 136 |
| Cross-Sectional | 35 |
| NA | 35 |
| Retrospective | 21 |
| Other | 8 |
| Longitudinal, Prospective | 2 |
| Cross-Sectional, Retrospective/Prospective | 1 |
| Country | Study_Count |
|---|---|
| United States | 3 |
| Brazil | 1 |
| Ethiopia | 1 |
| France | 1 |
| Mexico | 1 |
| NA | 1 |
| Spain | 1 |
| Tanzania | 1 |
| Site_count | Study_Count |
|---|---|
| 1 | 8 |
| 4 | 1 |
| 6 | 1 |
| Count of Versions | Count of Studies |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 1 |
| 4 | 1 |
| 6 | 1 |
| 7 | 1 |
| 13 | 1 |
| Change Type | Count_of_Changes | Count_of_Studies | ratio |
|---|---|---|---|
| Study Status | 31 | 8 | 3.875000 |
| None (earliest Version on record) | 10 | 10 | 1.000000 |
| Study Design | 9 | 6 | 1.500000 |
| Contacts/Locations | 8 | 4 | 2.000000 |
| Recruitment Status | 7 | 7 | 1.000000 |
| Sponsor/Collaborators | 7 | 3 | 2.333333 |
| Conditions | 5 | 2 | 2.500000 |
| Eligibility | 4 | 2 | 2.000000 |
| Study Description | 4 | 2 | 2.000000 |
| Study Identification | 4 | 2 | 2.000000 |
| References | 3 | 2 | 1.500000 |
| Outcome Measures | 2 | 2 | 1.000000 |
| Oversight | 2 | 1 | 2.000000 |
| Groups | 1 | 1 | 1.000000 |
| Interventions | 1 | 1 | 1.000000 |
| Measure | Registries |
|---|---|
| Min | 1.00 |
| 1st Qu | 132.75 |
| Median | 353.00 |
| Mean | 903.40 |
| 3rd Qu | 1147.50 |
| Max | 3760.00 |
| observational_model | Study_Count |
|---|---|
| Cohort | 3 |
| Ecologic or Community | 3 |
| Other | 2 |
| Case-Only | 1 |
| Case Control | 1 |
| time_perspective | Study_Count |
|---|---|
| Prospective | 10 |
| target_duration | Study_Count |
|---|---|
| 1 Year | 2 |
| 1 Day | 1 |
| 1 Month | 1 |
| 12 Months | 1 |
| 24 Months | 1 |
| 3 Years | 1 |
| 31 Years | 1 |
| 6 Months | 1 |
| 7 Months | 1 |